/**
 * vkBeautify - javascript plugin to pretty-print or minify text in XML, JSON, CSS and SQL formats.
 * https://github.com/aabluedragon/vkbeautify
 * Copyright (c) 2012 Vadim Kiryukhin
 * vkiryukhin @ gmail.com
 * http://www.eslinstructor.net/vkbeautify/
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 *   Pretty print
 *
 *        vkbeautify.xml(text [,indent_pattern]);
 *        vkbeautify.json(text [,indent_pattern]);
 *        vkbeautify.css(text [,indent_pattern]);
 *        vkbeautify.sql(text [,indent_pattern]);
 *
 *        @text - String; text to beatufy;
 *        @indent_pattern - Integer | String;
 *                Integer:  number of white spaces;
 *                String:   character string to visualize indentation ( can also be a set of white spaces )
 *   Minify
 *
 *        vkbeautify.xmlmin(text [,preserve_comments]);
 *        vkbeautify.jsonmin(text);
 *        vkbeautify.cssmin(text [,preserve_comments]);
 *        vkbeautify.sqlmin(text);
 *
 *        @text - String; text to minify;
 *        @preserve_comments - Bool; [optional];
 *                Set this flag to true to prevent removing comments from @text ( minxml and mincss functions only. )
 *
 *   Examples:
 *        vkbeautify.xml(text); // pretty print XML
 *        vkbeautify.json(text, 4 ); // pretty print JSON
 *        vkbeautify.css(text, '. . . .'); // pretty print CSS
 *        vkbeautify.sql(text, '----'); // pretty print SQL
 *
 *        vkbeautify.xmlmin(text, true);// minify XML, preserve comments
 *        vkbeautify.jsonmin(text);// minify JSON
 *        vkbeautify.cssmin(text);// minify CSS, remove comments ( default )
 *        vkbeautify.sqlmin(text);// minify SQL
 *
 */
function createShiftArr(step) {

  var space = '    ';

  if (isNaN(parseInt(step))) { // argument is string
    space = step;
  } else { // argument is integer
    switch (step) {
      case 1:
        space = ' ';
        break;
      case 2:
        space = '  ';
        break;
      case 3:
        space = '   ';
        break;
      case 4:
        space = '    ';
        break;
      case 5:
        space = '     ';
        break;
      case 6:
        space = '      ';
        break;
      case 7:
        space = '       ';
        break;
      case 8:
        space = '        ';
        break;
      case 9:
        space = '         ';
        break;
      case 10:
        space = '          ';
        break;
      case 11:
        space = '           ';
        break;
      case 12:
        space = '            ';
        break;
    }
  }

  var shift = ['\n']; // array of shifts
  for (var ix = 0; ix < 100; ix++) {
    shift.push(shift[ix] + space);
  }
  return shift;
}

function vkbeautify() {
  this.step = '    '; // 4 spaces
  this.shift = createShiftArr(this.step);
};

vkbeautify.prototype.xml = function (text, step) {

  var ar = text.replace(/>\s{0,}</g, "><")
    .replace(/</g, "~::~<")
    .replace(/\s*xmlns\:/g, "~::~xmlns:")
    .replace(/\s*xmlns\=/g, "~::~xmlns=")
    .split('~::~'),
    len = ar.length,
    inComment = false,
    deep = 0,
    str = '',
    ix = 0,
    shift = step ? createShiftArr(step) : this.shift;

  for (ix = 0; ix < len; ix++) {
    // start comment or <![CDATA[...]]> or <!DOCTYPE //
    if (ar[ix].search(/<!/) > -1) {
      str += shift[deep] + ar[ix];
      inComment = true;
      // end comment  or <![CDATA[...]]> //
      if (ar[ix].search(/-->/) > -1 || ar[ix].search(/\]>/) > -1 || ar[ix].search(/!DOCTYPE/) > -1) {
        inComment = false;
      }
    } else
      // end comment  or <![CDATA[...]]> //
      if (ar[ix].search(/-->/) > -1 || ar[ix].search(/\]>/) > -1) {
        str += ar[ix];
        inComment = false;
      } else
        // <elm></elm> //
        if (/^<\w/.exec(ar[ix - 1]) && /^<\/\w/.exec(ar[ix]) &&
          /^<[\w:\-\.\,]+/.exec(ar[ix - 1]) == /^<\/[\w:\-\.\,]+/.exec(ar[ix])[0].replace('/', '')) {
          str += ar[ix];
          if (!inComment) deep--;
        } else
          // <elm> //
          if (ar[ix].search(/<\w/) > -1 && ar[ix].search(/<\//) == -1 && ar[ix].search(/\/>/) == -1) {
            str = !inComment ? str += shift[deep++] + ar[ix] : str += ar[ix];
          } else
            // <elm>...</elm> //
            if (ar[ix].search(/<\w/) > -1 && ar[ix].search(/<\//) > -1) {
              str = !inComment ? str += shift[deep] + ar[ix] : str += ar[ix];
            } else
              // </elm> //
              if (ar[ix].search(/<\//) > -1) {
                str = !inComment ? str += shift[--deep] + ar[ix] : str += ar[ix];
              } else
                // <elm/> //
                if (ar[ix].search(/\/>/) > -1) {
                  str = !inComment ? str += shift[deep] + ar[ix] : str += ar[ix];
                } else
                  // <? xml ... ?> //
                  if (ar[ix].search(/<\?/) > -1) {
                    str += shift[deep] + ar[ix];
                  } else
                    // xmlns //
                    if (ar[ix].search(/xmlns\:/) > -1 || ar[ix].search(/xmlns\=/) > -1) {
                      str += shift[deep] + ar[ix];
                    }

    else {
      str += ar[ix];
    }
  }

  return (str[0] == '\n') ? str.slice(1) : str;
}

vkbeautify.prototype.json = function (text, step) {

  var step = step ? step : this.step;

  if (typeof JSON === 'undefined') return text;

  if (typeof text === "string") return JSON.stringify(JSON.parse(text), null, step);
  if (typeof text === "object") return JSON.stringify(text, null, step);

  return text; // text is not string nor object
}

vkbeautify.prototype.css = function (text, step) {

  var ar = text.replace(/\s{1,}/g, ' ')
    .replace(/\{/g, "{~::~")
    .replace(/\}/g, "~::~}~::~")
    .replace(/\;/g, ";~::~")
    .replace(/\/\*/g, "~::~/*")
    .replace(/\*\//g, "*/~::~")
    .replace(/~::~\s{0,}~::~/g, "~::~")
    .split('~::~'),
    len = ar.length,
    deep = 0,
    str = '',
    ix = 0,
    shift = step ? createShiftArr(step) : this.shift;

  for (ix = 0; ix < len; ix++) {

    if (/\{/.exec(ar[ix])) {
      str += shift[deep++] + ar[ix];
    } else
    if (/\}/.exec(ar[ix])) {
      str += shift[--deep] + ar[ix];
    } else
    if (/\*\\/.exec(ar[ix])) {
      str += shift[deep] + ar[ix];
    } else {
      str += shift[deep] + ar[ix];
    }
  }
  return str.replace(/^\n{1,}/, '');
}

//----------------------------------------------------------------------------

function isSubquery(str, parenthesisLevel) {
  return parenthesisLevel - (str.replace(/\(/g, '').length - str.replace(/\)/g, '').length)
}

function split_sql(str, tab) {

  return str.replace(/\s{1,}/g, " ")

    .replace(/ AND /ig, "~::~" + tab + tab + "AND ")
    .replace(/ BETWEEN /ig, "~::~" + tab + "BETWEEN ")
    .replace(/ CASE /ig, "~::~" + tab + "CASE ")
    .replace(/ ELSE /ig, "~::~" + tab + "ELSE ")
    .replace(/ END /ig, "~::~" + tab + "END ")
    .replace(/ FROM /ig, "~::~FROM ")
    .replace(/ GROUP\s{1,}BY/ig, "~::~GROUP BY ")
    .replace(/ HAVING /ig, "~::~HAVING ")
    //.replace(/ SET /ig," SET~::~")
    .replace(/ IN /ig, " IN ")

    .replace(/ JOIN /ig, "~::~JOIN ")
    .replace(/ CROSS~::~{1,}JOIN /ig, "~::~CROSS JOIN ")
    .replace(/ INNER~::~{1,}JOIN /ig, "~::~INNER JOIN ")
    .replace(/ LEFT~::~{1,}JOIN /ig, "~::~LEFT JOIN ")
    .replace(/ RIGHT~::~{1,}JOIN /ig, "~::~RIGHT JOIN ")

    .replace(/ ON /ig, "~::~" + tab + "ON ")
    .replace(/ OR /ig, "~::~" + tab + tab + "OR ")
    .replace(/ ORDER\s{1,}BY/ig, "~::~ORDER BY ")
    .replace(/ OVER /ig, "~::~" + tab + "OVER ")

    .replace(/\(\s{0,}SELECT /ig, "~::~(SELECT ")
    .replace(/\)\s{0,}SELECT /ig, ")~::~SELECT ")

    .replace(/ THEN /ig, " THEN~::~" + tab + "")
    .replace(/ UNION /ig, "~::~UNION~::~")
    .replace(/ USING /ig, "~::~USING ")
    .replace(/ WHEN /ig, "~::~" + tab + "WHEN ")
    .replace(/ WHERE /ig, "~::~WHERE ")
    .replace(/ WITH /ig, "~::~WITH ")

    //.replace(/\,\s{0,}\(/ig,",~::~( ")
    //.replace(/\,/ig,",~::~"+tab+tab+"")

    .replace(/ ALL /ig, " ALL ")
    .replace(/ AS /ig, " AS ")
    .replace(/ ASC /ig, " ASC ")
    .replace(/ DESC /ig, " DESC ")
    .replace(/ DISTINCT /ig, " DISTINCT ")
    .replace(/ EXISTS /ig, " EXISTS ")
    .replace(/ NOT /ig, " NOT ")
    .replace(/ NULL /ig, " NULL ")
    .replace(/ LIKE /ig, " LIKE ")
    .replace(/\s{0,}SELECT /ig, "SELECT ")
    .replace(/\s{0,}UPDATE /ig, "UPDATE ")
    .replace(/ SET /ig, " SET ")

    .replace(/~::~{1,}/g, "~::~")
    .split('~::~');
}

vkbeautify.prototype.sql = function (text, step) {

  var ar_by_quote = text.replace(/\s{1,}/g, " ")
    .replace(/\'/ig, "~::~\'")
    .split('~::~'),
    len = ar_by_quote.length,
    ar = [],
    deep = 0,
    tab = this.step, //+this.step,
    inComment = true,
    inQuote = false,
    parenthesisLevel = 0,
    str = '',
    ix = 0,
    shift = step ? createShiftArr(step) : this.shift;;

  for (ix = 0; ix < len; ix++) {
    if (ix % 2) {
      ar = ar.concat(ar_by_quote[ix]);
    } else {
      ar = ar.concat(split_sql(ar_by_quote[ix], tab));
    }
  }

  len = ar.length;
  for (ix = 0; ix < len; ix++) {

    parenthesisLevel = isSubquery(ar[ix], parenthesisLevel);

    if (/\s{0,}\s{0,}SELECT\s{0,}/.exec(ar[ix])) {
      ar[ix] = ar[ix].replace(/\,/g, ",\n" + tab + tab + "")
    }

    if (/\s{0,}\s{0,}SET\s{0,}/.exec(ar[ix])) {
      ar[ix] = ar[ix].replace(/\,/g, ",\n" + tab + tab + "")
    }

    if (/\s{0,}\(\s{0,}SELECT\s{0,}/.exec(ar[ix])) {
      deep++;
      str += shift[deep] + ar[ix];
    } else
    if (/\'/.exec(ar[ix])) {
      if (parenthesisLevel < 1 && deep) {
        deep--;
      }
      str += ar[ix];
    } else {
      str += shift[deep] + ar[ix];
      if (parenthesisLevel < 1 && deep) {
        deep--;
      }
    }
    var junk = 0;
  }

  str = str.replace(/^\n{1,}/, '').replace(/\n{1,}/g, "\n");
  return str;
}


vkbeautify.prototype.xmlmin = function (text, preserveComments) {

  var str = preserveComments ? text :
    text.replace(/\<![ \r\n\t]*(--([^\-]|[\r\n]|-[^\-])*--[ \r\n\t]*)\>/g, "")
    .replace(/[ \r\n\t]{1,}xmlns/g, ' xmlns');
  return str.replace(/>\s{0,}</g, "><");
}

vkbeautify.prototype.jsonmin = function (text) {

  if (typeof JSON === 'undefined') return text;

  return JSON.stringify(JSON.parse(text), null, 0);

}

vkbeautify.prototype.cssmin = function (text, preserveComments) {

  var str = preserveComments ? text :
    text.replace(/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g, "");

  return str.replace(/\s{1,}/g, ' ')
    .replace(/\{\s{1,}/g, "{")
    .replace(/\}\s{1,}/g, "}")
    .replace(/\;\s{1,}/g, ";")
    .replace(/\/\*\s{1,}/g, "/*")
    .replace(/\*\/\s{1,}/g, "*/");
}

vkbeautify.prototype.sqlmin = function (text) {
  return text.replace(/\s{1,}/g, " ").replace(/\s{1,}\(/, "(").replace(/\s{1,}\)/, ")");
}

//module.exports = new vkbeautify();
export default vkbeautify;
